Hi Alberto,
I am happy to see that you've finally arrived with us at this English course!
Don't worry about Week 1 the material is still online and you can work through it in your own tempo! If you have any question, please post into this feedback forum, so I can help you.
I'm sure you will be able to catch up with the missed activities and join the others in the group activities for Week 3. If you want to get to know your classmates, you can always open a new discussion forum to post a question, use the chat function, or just write a message to one of the others. :-)
Have a good start and have fun with English!
Best, Julia